Todoist have html5 version, which works in offline mode better than this app - http://todoist.com/html5

2012-07-29 21:24Byradzaw sec

Nice, very basic interface to Todoist. Needs a few bells and whistles before I'll use it over the mobile website, such as the ability to edit a task or the option to not show completed tasks. Shows promise.

2012-06-24 13:11ByTerryDiederich

Terrible

2012-05-05 14:35ByPlayer524269780

Appears server is down :-(.

2011-10-17 23:38ByRaleighMochaMan

Email tasks from Gmail and outlook show up terrible with the guid in the name of the task

No offline cache means this app is useless when I need it most. Goodbye.

2011-08-05 16:55ByMecha Sonic

Great app. Its nice that you followed the metro theme but kept the look and feel of the actual site.

2011-08-02 19:39Bydlsprowls

very nice todo

2011-07-26 23:14BySripwl

Needs to work without online connection

My only real problem with this is a big one, IMHO. You cannot add ToDo items unless you have an active internet connection. If this is not a problem for you, then this works well with todoist. But for me, I don't always have my phone 3G enabled. I rely more upon wifi to keep data usage down. Either way, why couldn't you allow it to work and then sync when a connection is available. I think that most apps should adopt a "sometimes connected" paradigm unless they absolutely need constant refreshing with cloud or servers.
It would also be nice if it retained the indentations in your online list. But that's very minor.
Overall, if you have a constant data connection and use Todoist, this is a great app. If not, it may not suit you.